hadoop：slf4j-log4j12-1.7.5.jar 和 hdfs dfs -put 问题的解决

问题1：

[root@master hadoop-2.6.0]# hdfs dfs -mkdir -p /bigdatacaseSLF4J: Class path contains multiple SLF4J bindings.SLF4J: Found binding in [jar:file:/opt/hadoop-2.6.0/share/hadoop/common/lib/slf4j-log4j12-1.7.5.jar!/org/slf4j/impl/StaticLoggerBinder.class]SLF4J: Found binding in [jar:file:/home/fhx/hbase-1.2.4/lib/slf4j-log4j12-1.7.5.jar!/org/slf4j/impl/StaticLoggerBinder.class]SLF4J: See http://www.slf4j.org/codes.html#multiple_bindings for an explanation.SLF4J: Actual binding is of type [org.slf4j.impl.Log4jLoggerFactory]

解决方法：

/home/fhx/hbase-1.2.4/lib/  rm -rf  slf4j-log4j12-1.7.5.jar

注意看报错内容
类路径含有多个slf4j-log4j12-1.7.5.jar
本来应该是hadoop路径下的，hbase也有，造成了困扰，因此找到Hbase下的slf4j-log4j12-1.7.5.jar并删除

问题2

[root@master hadoop-2.6.0]# hdfs dfs -put /usr/local/bigdatacase/dataset/user_table.txt /bigdatacase/dataset17/12/10 14:07:49 WARN hdfs.DFSClient: DataStreamer Exceptionorg.apache.hadoop.ipc.RemoteException(java.io.IOException): File /bigdatacase/dataset/user_table.txt._COPYING_ could only be replicated to 0 nodes instead of minReplication (=1).  There are 0 datanode(s) running and no node(s) are excluded in this operation.    at org.apache.hadoop.hdfs.server.blockmanagement.BlockManager.chooseTarget4NewBlock(BlockManager.java:1549)    at org.apache.hadoop.hdfs.server.namenode.FSNamesystem.getAdditionalBlock(FSNamesystem.java:3200)    at org.apache.hadoop.hdfs.server.namenode.NameNodeRpcServer.addBlock(NameNodeRpcServer.java:641)    at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolServerSideTranslatorPB.addBlock(ClientNamenodeProtocolServerSideTranslatorPB.java:482)    at org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos$ClientNamenodeProtocol$2.callBlockingMethod(ClientNamenodeProtocolProtos.java)    at org.apache.hadoop.ipc.ProtobufRpcEngine$Server$ProtoBufRpcInvoker.call(ProtobufRpcEngine.java:619)    at org.apache.hadoop.ipc.RPC$Server.call(RPC.java:962)    at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2039)    at org.apache.hadoop.ipc.Server$Handler$1.run(Server.java:2035)    at java.security.AccessController.doPrivileged(Native Method)    at javax.security.auth.Subject.doAs(Subject.java:422)    at org.apache.hadoop.security.UserGroupInformation.doAs(UserGroupInformation.java:1628)    at org.apache.hadoop.ipc.Server$Handler.run(Server.java:2033)    at org.apache.hadoop.ipc.Client.call(Client.java:1468)    at org.apache.hadoop.ipc.Client.call(Client.java:1399)    at org.apache.hadoop.ipc.ProtobufRpcEngine$Invoker.invoke(ProtobufRpcEngine.java:232)    at com.sun.proxy.$Proxy9.addBlock(Unknown Source)    at org.apache.hadoop.hdfs.protocolPB.ClientNamenodeProtocolTranslatorPB.addBlock(ClientNamenodeProtocolTranslatorPB.java:399)    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)    at java.lang.reflect.Method.invoke(Method.java:498)    at org.apache.hadoop.io.retry.RetryInvocationHandler.invokeMethod(RetryInvocationHandler.java:187)    at org.apache.hadoop.io.retry.RetryInvocationHandler.invoke(RetryInvocationHandler.java:102)    at com.sun.proxy.$Proxy10.addBlock(Unknown Source)    at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.locateFollowingBlock(DFSOutputStream.java:1532)    at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.nextBlockOutputStream(DFSOutputStream.java:1349)    at org.apache.hadoop.hdfs.DFSOutputStream$DataStreamer.run(DFSOutputStream.java:588)put: File /bigdatacase/dataset/user_table.txt._COPYING_ could only be replicated to 0 nodes instead of minReplication (=1).  There are 0 datanode(s) running and no node(s) are excluded in this operation.

解决方法：

将hadoop数据区赋予写的权限

找了好多解决方案均无效，最后被修改权限拯救